YouTube Timestamp is a Chrome extension that saves exact moments in YouTube videos with notes and tags. Keep them in a searchable local library, and use the workspace beside the video to read transcripts, generate AI summaries, and ask questions about the video.
It is not a YouTube chapter maker, a timestamp-link generator, or an official YouTube product. Those are YouTube features. This is a personal clipper for moments you want to keep.
On a YouTube watch page, press B or click the player bookmark, then add a note and tags. Your saves stay in a searchable local library on this Chrome profile. Open Workspace beside the video or your Library to revisit them. The extension is for desktop Chrome; use JSON backup and restore to move your library between devices.
Unlimited local bookmarks and notes. No sign-up required.